SpringBoot项目配置Mysql多数据源

SpringBoot项目配置Mysql多数据源 SpringBoot现在是很多很多公司应用的后端框架，Spring Boot是一个便捷搭建 基于spring工程的脚手架；作用是帮助开发人员快速搭建大型的spring 项目。简化工程的配置，依赖管理；实现开发人员把时间都集中在业务开发上。现在呢我们就来聊一聊使用Spring Boot如何接入并使用多个数据源的问题.这里呢我只写一些主要的DataSource配置类.

这里先准备新建一个干净的SpringBoot项目做一个demo(springboot版本我这里选择的是2.2.2)

<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.2.2.RELEASE</version> </parent>

引入主要pom文件如下:

<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.2</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency>

新建application.yml配置文件,设置数据源信息

spring.datasource.test1.jdbcUrl = jdbc:mysql://127.0.0.1:3306/test1?createDatabaseIfNotExist=true&useUnicode=true&characterEncoding=UTF-8 spring.datasource.test1.username = root spring.datasource.test1.password = root spring.datasource.test1.driverClassName = com.mysql.jdbc.Driver #test2数据库的配置 spring.datasource.test2.jdbcUrl = jdbc:mysql://127.0.0.1:3306/test2?createDatabaseIfNotExist=true&useUnicode=true&characterEncoding=UTF-8 spring.datasource.test2.username = root spring.datasource.test2.password = root spring.datasource.test2.driverClassName = com.mysql.jdbc.Driver

在项目目录下新建config包,用于放数据源配置类:

在config包下新建DataSource1Config类:

import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.SqlSessionFactoryBean; import org.mybatis.spring.SqlSessionTemplate; import org.mybatis.spring.annotation.MapperScan; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.boot.jdbc.DataSourceBuilder; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.Primary; import org.springframework.jdbc.datasource.DataSourceTransactionManager; import javax.sql.DataSource; @Configuration @MapperScan(basePackages = "cn.vernall.mapper.test1", sqlSessionFactoryRef = "test1SqlSessionFactory") public class DataSource1Config { @Bean(name = "test1DataSource") @ConfigurationProperties(prefix = "spring.datasource.test1") @Primary public DataSource testDataSource() { return DataSourceBuilder.create().build(); } @Bean(name = "test1SqlSessionFactory") @Primary public SqlSessionFactory testSqlSessionFactory(@Qualifier("test1DataSource") DataSource dataSource) throws Exception { SqlSessionFactoryBean bean = new SqlSessionFactoryBean(); bean.setDataSource(dataSource); return bean.getObject(); } @Bean(name = "test1TransactionManager") @Primary public DataSourceTransactionManager testTransactionManager(@Qualifier("test1DataSource") DataSource dataSource) { return new DataSourceTransactionManager(dataSource); } @Bean(name = "test1SqlSessionTemplate") @Primary public SqlSessionTemplate testSqlSessionTemplate(@Qualifier("test1SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception { return new SqlSessionTemplate(sqlSessionFactory); } }

其中@primary注解是用来表示当前数据源为默认数据源,没有特别指定的情况下项目使用的数据源为被该注解修饰的数据源,@primary必需要有并且只能修饰一个数据源,不然会有异常.

在config包下新建DataSource2Config类

import org.apache.ibatis.session.SqlSessionFactory import org.mybatis.spring.SqlSessionFactoryBean; import org.mybatis.spring.SqlSessionTemplate; import org.mybatis.spring.annotation.MapperScan; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.boot.jdbc.DataSourceBuilder; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.Primary; import org.springframework.jdbc.datasource.DataSourceTransactionManager; import javax.sql.DataSource; @Configuration @MapperScan(basePackages = "cn.vernall.mapper.test2", sqlSessionFactoryRef = "test2SqlSessionFactory") public class DataSource2Config { @Bean(name = "test2DataSource") @ConfigurationProperties(prefix = "spring.datasource.test2") public DataSource testDataSource() { return DataSourceBuilder.create().build(); } @Bean(name = "test2SqlSessionFactory") @Primary public SqlSessionFactory testSqlSessionFactory(@Qualifier("test2DataSource") DataSource dataSource) throws Exception { SqlSessionFactoryBean bean = new SqlSessionFactoryBean(); bean.setDataSource(dataSource); return bean.getObject(); } @Bean(name = "test2TransactionManager") @Primary public DataSourceTransactionManager testTransactionManager(@Qualifier("test2DataSource") DataSource dataSource) { return new DataSourceTransactionManager(dataSource); } @Bean(name = "test2SqlSessionTemplate") @Primary public SqlSessionTemplate testSqlSessionTemplate(@Qualifier("test2SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception { return new SqlSessionTemplate(sqlSessionFactory); } }

转自这位大佬的博客